| 摘要 |
PURPOSE:To prevent thermal expansion and distorsion of a valve by cooling the valve by circulation of internal cooling water and adsorbing heat from sheet side of a corresponding valve box. CONSTITUTION:Cooling water is supplied from supply mouthpieces 22, 22 to make the cooling water circulate in both valves B, B in a whirpool, and then carried away from draining mouthpieces 23, 23 to cool the valve B, B. Thus, heat is absrobed from sheets 1, 1 corresponding to the valves B, B so as to prevent thermal expansion and distorsion at the portions and maintain valve function of high accuracy. |
